FI 4 port Dyno Results
503wtq Boosted Bimmer
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hurry, I want to see how my "rx-8" did on the dyno.
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FI by Pettit-BHR-Cobb AP
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From: Sin City, Nevada
Oh man, you've just brought up a topic I was wondering like mad about.
How difficult is it to get a CF drive shaft from the MT into the AT? I searched and searched and there are like no threads about it!
@Phil,
Wouldn't the FI be the solution to the air? So increasing your injectors and tuning would just be the second step to it right? I'm sure I'm missing something here, can you explain more?
How difficult is it to get a CF drive shaft from the MT into the AT? I searched and searched and there are like no threads about it!
@Phil,
Wouldn't the FI be the solution to the air? So increasing your injectors and tuning would just be the second step to it right? I'm sure I'm missing something here, can you explain more?
JinDesu, you must have missed the fact that I am FI. The Pettit supercharger does qualify
. There is no way a stock 4port can make 256hp.More air = more horsepower. See my garage for my list of mods.
The AT shaft is metal (steel) and the MT shaft is carbon fiber. I'm not really sure that the few pounds that I would loose would make that much difference. Also the CF shaft is subject to being shattered easily. Unless it pencils out, I think I will stay with the metal shaft for the time being. Oh they are interchangeable.
JinDesu, you must have missed the fact that I am FI. The Pettit supercharger does qualify. There is no way a stock 4port can make 256hp.More air = more horsepower. See my garage for my list of mods.
JinDesu, you must have missed the fact that I am FI. The Pettit supercharger does qualify
. There is no way a stock 4port can make 256hp.More air = more horsepower. See my garage for my list of mods.My question was where you stated that it was getting the air and fuel into a 4-port. I was confused because I know you are getting more air in because of the FI!
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FI by Pettit-BHR-Cobb AP
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We are just forcing the air thru the existing intake manifold. We installed larger injectors in the fuel rail to get me the fuel I needed. I hope that answered your question. Nothing new but getting the right mixture is important
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wow thanks for sharing with us phil! I've been thinking about going FI. I saved up just enough for the kit, but something always keeps me from purchasing it. How big of a difference do you feel? The more you can tell me, I think i'll just purchase it! 
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FI by Pettit-BHR-Cobb AP
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Well when you add 100 horses to a stocker you are bound to feel the difference. It runs so smooth that you think that this is the way the car should have come from Mazda. Not sure how the turbo feels but it must feel something like mine.
3-wheeler
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From: Phoenix
Again congrats Phil on a successful dyno pull! Great job to everyone who has been involved with Phil's car as I believe pulling 100+whp out of a 4 port automatic is a great thing to see happen. Jeff commented that the car was still producing power but was hitting the 125mph limiter in 3rd gear. A 4th gear pull could have been done but it's a lot of strain on the motor so I don't blame Phil for quitting while he was still ahead.
Looking at the power curve he was on track for 265whp easy.
Now go enjoy your car Phil!
Looking at the power curve he was on track for 265whp easy.
Now go enjoy your car Phil!
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interesting, now i really want to buy it and see how it is on my car! thanks phil
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FI by Pettit-BHR-Cobb AP
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If anyone is interested in seeing my dyno graphs see here https://www.rx8club.com/showthread.p...27674&page=249
Phil ur results give me new hope for my 4port I have desided to keep it an not trade in for the(more expensive) 6port my 9000 price tag is now worth it
THANX off to rob a bank now
THANX off to rob a bank now
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FI by Pettit-BHR-Cobb AP
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My goal is 300hp but I'm also realistic. I don't need to rebuild an engine to prove it can be done. I have a few refinements to get done and maybe I'll do another dyno to see if they helped.
Phil: you have till Jan / February to make these 'refinements' then it's back on Steve's dyno!
(hoping the SoCal crew didnt' see what I just hinted at or I'll get flooded with questions)
(hoping the SoCal crew didnt' see what I just hinted at or I'll get flooded with questions)
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FI by Pettit-BHR-Cobb AP
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From: Sin City, Nevada
Good to hear......... Don't forget the cable
Those guys don't miss anything on the forum you will be inundated shortly. Oh yea some of those refinements will be done on Friday according to the post from Ray 
Keep me apprised as Nancy wants to come this time (she will be bored but what the hell) - din din and drinks for sure. We will of course need the mad scientist and the "have tools will travel" guy.
Keep me apprised as Nancy wants to come this time (she will be bored but what the hell) - din din and drinks for sure. We will of course need the mad scientist and the "have tools will travel" guy.
NO A/C :(
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From: Silver Spring, MD
I'm also realistic, however IMO, I believe the renesis 4 port can produce atleast 295 whp if tuned right of course and or maybe another turbo kit could possibly be in the works for the 4 port........ I like to dream, sorry.